There are always unethical people out there trying to get what you work hard for. Sometimes they're successful. That's why you should be warned. One of the scams out there right now involves an "IRS agent calling you up and saying you have unpaid tax bills and, if they aren't paid, there will be a warrant issued for your arrest.
While this scam has been primarily confined to Winslow, there's no doubt that others will start getting calls so keep your guard up. Find out what the IRS has to say HERE.